654957977 has 2 divisors, whose sum is σ = 654957978. Its totient is φ = 654957976.

The previous prime is 654957973. The next prime is 654957991. The reversal of 654957977 is 779759456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 588111001 + 66846976 = 24251^2 + 8176^2 .

It is a cyclic number.

It is not a de Polignac number, because 654957977 - 2² = 654957973 is a prime.

It is not a weakly prime, because it can be changed into another prime (654957973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327478988 + 327478989.

It is an arithmetic number, because the mean of its divisors is an integer number (327478989).

Almost surely, 2^654957977 is an apocalyptic number.

It is an amenable number.

654957977 is a deficient number, since it is larger than the sum of its proper divisors (1).

654957977 is an equidigital number, since it uses as much as digits as its factorization.

654957977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16669800, while the sum is 59.

The square root of 654957977 is about 25592.1467837304. The cubic root of 654957977 is about 868.4359873218.

The spelling of 654957977 in words is "six hundred fifty-four million, nine hundred fifty-seven thousand, nine hundred seventy-seven".